tests: merge-recursive is usable without Python

Many tests still protected themselves with $no_python; there is no need
to do so anymore.
Signed-off-by: NJunio C Hamano <junkio@cox.net>

t/t3401-rebase-partial.sh

@@ -52,13 +52,10 @@ test_expect_success \
     'rebase topic branch against new master and check git-am did not get halted' \
     'git-rebase master && test ! -d .dotest'
 
-if test -z "$no_python"
-then
-    test_expect_success \
+test_expect_success \
 	'rebase --merge topic branch that was partially merged upstream' \
 	'git-checkout -f my-topic-branch-merge &&
 	 git-rebase --merge master-merge &&
 	 test ! -d .git/.dotest-merge'
-fi
 
 test_done

t/t3402-rebase-merge.sh

@@ -7,12 +7,6 @@ test_description='git rebase --merge test'
 
 . ./test-lib.sh
 
-if test "$no_python"; then
-	echo "Skipping: no python => no recursive merge"
-	test_done
-	exit 0
-fi
-
 T="A quick brown fox
 jumps over the lazy dog."
 for i in 1 2 3 4 5 6 7 8 9 10

t/t3403-rebase-skip.sh

@@ -10,12 +10,6 @@ test_description='git rebase --merge --skip tests'
 # we assume the default git-am -3 --skip strategy is tested independently
 # and always works :)
 
-if test "$no_python"; then
-	echo "Skipping: no python => no recursive merge"
-	test_done
-	exit 0
-fi
-
 test_expect_success setup '
 	echo hello > hello &&
 	git add hello &&

t/t6021-merge-criss-cross.sh

@@ -10,12 +10,6 @@
 test_description='Test criss-cross merge'
 . ./test-lib.sh
 
-if test "$no_python"; then
-	echo "Skipping: no python => no recursive merge"
-	test_done
-	exit 0
-fi
-
 test_expect_success 'prepare repository' \
 'echo "1
 2

t/t6022-merge-rename.sh

@@ -3,12 +3,6 @@
 test_description='Merge-recursive merging renames'
 . ./test-lib.sh
 
-if test "$no_python"; then
-	echo "Skipping: no python => no recursive merge"
-	test_done
-	exit 0
-fi
-
 test_expect_success setup \
 '
 cat >A <<\EOF &&