PPC: remove test excludes no longer required

The test/cctest/cctest.status and test/mjsunit/mjsunit.status
tests now pass under the simulator so removing these
excludes

	modified:   test/cctest/cctest.status
	modified:   test/mjsunit/mjsunit.status

R=danno@chromium.org, svenpanne@chromium.org

BUG=

Review URL: https://codereview.chromium.org/995393003

Cr-Commit-Position: refs/heads/master@{#27145}

test/cctest/cctest.status

@@ -405,9 +405,6 @@
   'test-api/Threading2': [SKIP],
   'test-api/ExternalArrays': [SKIP],
 
-  # issues to be investigated based on latest uplevel
-  'test-run-machops/RunWord64EqualInBranchP': [SKIP],
-
   # will not pass until we agree/implement changes to serializce.cc
   'test-serialize/SerializeInternalReference': [SKIP],
 

test/mjsunit/mjsunit.status

@@ -595,7 +595,6 @@
   'asm/embenchen/box2d': [SKIP],
 
   # issues to be investigated based on latest uplevel
-  'es6/collections': [SKIP],
   'debug-references': [SKIP],
 }],  # 'arch == ppc and simulator_run == True'
 ]