tests: remove non-python3 line matching and tests block

We don't support Python2 anymore

tests/test-bundle2-exchange.t

@@ -739,12 +739,10 b' Check output capture control.'
   $ hg -R main push ssh://user@dummy/other -r e7ec4e813ba6
   pushing to ssh://user@dummy/other
   searching for changes
-  remote: Fail early! (no-py3 chg !)
   remote: adding changesets
   remote: adding manifests
   remote: adding file changes
   remote: Fail early! (py3 !)
-  remote: Fail early! (no-py3 no-chg !)
   remote: transaction abort!
   remote: Cleaning up the mess...
   remote: rollback completed

tests/test-install.t

@@ -233,42 +233,3 b" since it's bin on most platforms but Scr"
   checking username (test)
   no problems detected
 #endif
-
-#if virtualenv no-py3 network-io no-pyoxidizer
-
-Note: --no-site-packages is the default for all versions enabled by hghave
-
-  $ "$PYTHON" -m virtualenv installenv >> pip.log
-  DEPRECATION: Python 2.7 will reach the end of its life on January 1st, 2020. Please upgrade your Python as Python 2.7 won't be maintained after that date. A future version of pip will drop support for Python 2.7. (?)
-  DEPRECATION: Python 2.7 will reach the end of its life on January 1st, 2020. Please upgrade your Python as Python 2.7 won't be maintained after that date. A future version of pip will drop support for Python 2.7. More details about Python 2 support in pip, can be found at https://pip.pypa.io/en/latest/development/release-process/#python-2-support (?)
-
-Note: we use this weird path to run pip and hg to avoid platform differences,
-since it's bin on most platforms but Scripts on Windows.
-  $ ./installenv/*/pip install $TESTDIR/.. >> pip.log
-  DEPRECATION: Python 2.7 will reach the end of its life on January 1st, 2020. Please upgrade your Python as Python 2.7 won't be maintained after that date. A future version of pip will drop support for Python 2.7. (?)
-  DEPRECATION: Python 2.7 will reach the end of its life on January 1st, 2020. Please upgrade your Python as Python 2.7 won't be maintained after that date. A future version of pip will drop support for Python 2.7. More details about Python 2 support in pip, can be found at https://pip.pypa.io/en/latest/development/release-process/#python-2-support (?)
-  DEPRECATION: Python 2.7 reached the end of its life on January 1st, 2020. Please upgrade your Python as Python 2.7 is no longer maintained. pip 21.0 will drop support for Python 2.7 in January 2021. More details about Python 2 support in pip can be found at https://pip.pypa.io/en/latest/development/release-process/#python-2-support pip 21.0 will remove support for this functionality. (?)
-  $ ./installenv/*/hg debuginstall || cat pip.log
-  checking encoding (ascii)...
-  checking Python executable (*) (glob)
-  checking Python implementation (*) (glob)
-  checking Python version (2.*) (glob)
-  checking Python lib (*)... (glob)
-  checking Python security support (*) (glob)
-    TLS 1.2 not supported by Python install; network connections lack modern security (?)
-    SNI not supported by Python install; may have connectivity issues with some servers (?)
-  checking Rust extensions \((installed|missing)\) (re)
-  checking Mercurial version (*) (glob)
-  checking Mercurial custom build (*) (glob)
-  checking module policy (*) (glob)
-  checking installed modules (*/mercurial)... (glob)
-  checking registered compression engines (*) (glob)
-  checking available compression engines (*) (glob)
-  checking available compression engines for wire protocol (*) (glob)
-  checking "re2" regexp engine \((available|missing)\) (re)
-  checking templates ($TESTTMP/installenv/*/site-packages/mercurial/templates)... (glob)
-  checking default template ($TESTTMP/installenv/*/site-packages/mercurial/templates/map-cmdline.default) (glob)
-  checking commit editor... (*) (glob)
-  checking username (test)
-  no problems detected
-#endif

tests/test-ssh-bundle1.t

@@ -293,9 +293,7 b' push should succeed even though it has a'
   remote: adding manifests
   remote: adding file changes
   remote: added 1 changesets with 1 changes to 1 files (py3 !)
-  remote: added 1 changesets with 1 changes to 1 files (no-py3 no-chg !)
   remote: KABOOM
-  remote: added 1 changesets with 1 changes to 1 files (no-py3 chg !)
   $ hg -R ../remote heads
   changeset:   5:1383141674ec
   tag:         tip
@@ -463,9 +461,7 b' stderr from remote commands should be pr'
   remote: adding manifests
   remote: adding file changes
   remote: added 1 changesets with 1 changes to 1 files (py3 !)
-  remote: added 1 changesets with 1 changes to 1 files (no-py3 no-chg !)
   remote: KABOOM
-  remote: added 1 changesets with 1 changes to 1 files (no-py3 chg !)
   local stdout
 
 debug output

tests/test-ssh.t

@@ -290,10 +290,8 b' push should succeed even though it has a'
   remote: adding manifests
   remote: adding file changes
   remote: added 1 changesets with 1 changes to 1 files (py3 !)
-  remote: added 1 changesets with 1 changes to 1 files (no-py3 no-chg !)
   remote: KABOOM
   remote: KABOOM IN PROCESS
-  remote: added 1 changesets with 1 changes to 1 files (no-py3 chg !)
   $ hg -R ../remote heads
   changeset:   5:1383141674ec
   tag:         tip
@@ -515,10 +513,8 b' stderr from remote commands should be pr'
   remote: adding manifests
   remote: adding file changes
   remote: added 1 changesets with 1 changes to 1 files (py3 !)
-  remote: added 1 changesets with 1 changes to 1 files (no-py3 no-chg !)
   remote: KABOOM
   remote: KABOOM IN PROCESS
-  remote: added 1 changesets with 1 changes to 1 files (no-py3 chg !)
   local stdout
 
 debug output