update: remove redundant and misplaced merge tests

The "nothing to merge" case is covered by test-merge-default.t.

The "uncommitted changes" case is covered by test-merge1.t (and
others).

The "merge -f" case is covered by test-merge-force.t.

tests/test-up-local-change.t

@@ -1,241 +1,191 b''
   $ HGMERGE=true; export HGMERGE
 
   $ hg init r1
   $ cd r1
   $ echo a > a
   $ hg addremove
   adding a
   $ hg commit -m "1"
 
   $ hg clone . ../r2
   updating to branch default
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ cd ../r2
   $ hg up
   0 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ echo abc > a
   $ hg diff --nodates
   diff -r c19d34741b0a a
   --- a/a
   +++ b/a
   @@ -1,1 +1,1 @@
   -a
   +abc
 
   $ cd ../r1
   $ echo b > b
   $ echo a2 > a
   $ hg addremove
   adding b
   $ hg commit -m "2"
 
   $ cd ../r2
   $ hg -q pull ../r1
   $ hg status
   M a
   $ hg parents
   changeset:   0:c19d34741b0a
   user:        test
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     1
   
   $ hg --debug up
     searching for copies back to rev 1
     unmatched files in other:
      b
   resolving manifests
    branchmerge: False, force: False, partial: False
    ancestor: c19d34741b0a, local: c19d34741b0a+, remote: 1e71731e6fbb
    preserving a for resolve of a
    b: remote created -> g
   getting b
   updating: b 1/2 files (50.00%)
    a: versions differ -> m
   updating: a 2/2 files (100.00%)
   picked tool 'true' for a (binary False symlink False)
   merging a
   my a@c19d34741b0a+ other a@1e71731e6fbb ancestor a@c19d34741b0a
   1 files updated, 1 files merged, 0 files removed, 0 files unresolved
   $ hg parents
   changeset:   1:1e71731e6fbb
   tag:         tip
   user:        test
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     2
   
   $ hg --debug up 0
   resolving manifests
    branchmerge: False, force: False, partial: False
    ancestor: 1e71731e6fbb, local: 1e71731e6fbb+, remote: c19d34741b0a
    preserving a for resolve of a
    b: other deleted -> r
   removing b
   updating: b 1/2 files (50.00%)
    a: versions differ -> m
   updating: a 2/2 files (100.00%)
   picked tool 'true' for a (binary False symlink False)
   merging a
   my a@1e71731e6fbb+ other a@c19d34741b0a ancestor a@1e71731e6fbb
   0 files updated, 1 files merged, 1 files removed, 0 files unresolved
   $ hg parents
   changeset:   0:c19d34741b0a
   user:        test
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     1
   
-  $ hg --debug merge
-  abort: nothing to merge
-  (use 'hg update' instead)
-  [255]
   $ hg parents
   changeset:   0:c19d34741b0a
   user:        test
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     1
   
   $ hg --debug up
     searching for copies back to rev 1
     unmatched files in other:
      b
   resolving manifests
    branchmerge: False, force: False, partial: False
    ancestor: c19d34741b0a, local: c19d34741b0a+, remote: 1e71731e6fbb
    preserving a for resolve of a
    b: remote created -> g
   getting b
   updating: b 1/2 files (50.00%)
    a: versions differ -> m
   updating: a 2/2 files (100.00%)
   picked tool 'true' for a (binary False symlink False)
   merging a
   my a@c19d34741b0a+ other a@1e71731e6fbb ancestor a@c19d34741b0a
   1 files updated, 1 files merged, 0 files removed, 0 files unresolved
   $ hg parents
   changeset:   1:1e71731e6fbb
   tag:         tip
   user:        test
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     2
   
   $ hg -v history
   changeset:   1:1e71731e6fbb
   tag:         tip
   user:        test
   date:        Thu Jan 01 00:00:00 1970 +0000
   files:       a b
   description:
   2
   
   
   changeset:   0:c19d34741b0a
   user:        test
   date:        Thu Jan 01 00:00:00 1970 +0000
   files:       a
   description:
   1
   
   
   $ hg diff --nodates
   diff -r 1e71731e6fbb a
   --- a/a
   +++ b/a
   @@ -1,1 +1,1 @@
   -a2
   +abc
 
 
 create a second head
 
   $ cd ../r1
   $ hg up 0
   1 files updated, 0 files merged, 1 files removed, 0 files unresolved
   $ echo b2 > b
   $ echo a3 > a
   $ hg addremove
   adding b
   $ hg commit -m "3"
   created new head
 
   $ cd ../r2
   $ hg -q pull ../r1
   $ hg status
   M a
   $ hg parents
   changeset:   1:1e71731e6fbb
   user:        test
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     2
   
   $ hg --debug up
   abort: uncommitted changes
   (commit and merge, or update --clean to discard changes)
   [255]
-  $ hg --debug merge
-  abort: uncommitted changes
-  (use 'hg status' to list changes)
-  [255]
-  $ hg --debug merge -f
-    searching for copies back to rev 1
-    unmatched files new in both:
-     b
-  resolving manifests
-   branchmerge: True, force: True, partial: False
-   ancestor: c19d34741b0a, local: 1e71731e6fbb+, remote: 83c51d0caff4
-   preserving a for resolve of a
-   preserving b for resolve of b
-   a: versions differ -> m
-  updating: a 1/2 files (50.00%)
-  picked tool 'true' for a (binary False symlink False)
-  merging a
-  my a@1e71731e6fbb+ other a@83c51d0caff4 ancestor a@c19d34741b0a
-   b: both created -> m
-  updating: b 2/2 files (100.00%)
-  picked tool 'true' for b (binary False symlink False)
-  merging b
-  my b@1e71731e6fbb+ other b@83c51d0caff4 ancestor b@000000000000
-  0 files updated, 2 files merged, 0 files removed, 0 files unresolved
-  (branch merge, don't forget to commit)
-  $ hg parents
-  changeset:   1:1e71731e6fbb
-  user:        test
-  date:        Thu Jan 01 00:00:00 1970 +0000
-  summary:     2
-  
-  changeset:   2:83c51d0caff4
-  tag:         tip
-  parent:      0:c19d34741b0a
-  user:        test
-  date:        Thu Jan 01 00:00:00 1970 +0000
-  summary:     3
-  
-  $ hg diff --nodates
-  diff -r 1e71731e6fbb a
-  --- a/a
-  +++ b/a
-  @@ -1,1 +1,1 @@
-  -a2
-  +abc
-
 
 test a local add
 
   $ cd ..
   $ hg init a
   $ hg init b
   $ echo a > a/a
   $ echo a > b/a
   $ hg --cwd a commit -A -m a
   adding a
   $ cd b
   $ hg add a
   $ hg pull -u ../a
   pulling from ../a
   requesting all changes
   adding changesets
   adding manifests
   adding file changes
   added 1 changesets with 1 changes to 1 files
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ hg st
 
   $ cd ..