rm: drop misleading 'use -f' hint for the rm --after 'not removing' warning

A warning mentioning 'forgetting' or 'recording delete' would be more correct
than 'not removing' but also more confusing.

mercurial/commands.py

@@ -4880,8 +4880,7 b' def remove(ui, repo, *pats, **opts):'
     elif after:
         list = deleted
         for f in modified + added + clean:
-            ui.warn(_('not removing %s: file still exists (use -f'
-                      ' to force removal)\n') % m.rel(f))
+            ui.warn(_('not removing %s: file still exists\n') % m.rel(f))
             ret = 1
     else:
         list = deleted + clean

tests/test-remove.t

@@ -107,7 +107,7 b' 20 state added, options -A'
   $ echo b > bar
   $ hg add bar
   $ remove -A bar
-  not removing bar: file still exists (use -f to force removal)
+  not removing bar: file still exists
   exit code: 1
   A bar
   ./bar
@@ -117,7 +117,7 b' 20 state added, options -A'
 21 state clean, options -A
 
   $ remove -A foo
-  not removing foo: file still exists (use -f to force removal)
+  not removing foo: file still exists
   exit code: 1
   ? bar
   ./bar
@@ -128,7 +128,7 b' 22 state modified, options -A'
 
   $ echo b >> foo
   $ remove -A foo
-  not removing foo: file still exists (use -f to force removal)
+  not removing foo: file still exists
   exit code: 1
   M foo
   ? bar
@@ -220,7 +220,7 b' dir, options -A'
 
   $ rm test/bar
   $ remove -A test
-  not removing test/foo: file still exists (use -f to force removal) (glob)
+  not removing test/foo: file still exists (glob)
   removing test/bar (glob)
   exit code: 1
   R test/bar