Remove unused versions of robolectric

Test: cs platform-robolectric-[amrs]
Test: cs platform-robolectric-3.4.2
Test: cs platform-robolectric-3.5.1
Test: cs robolectric/3.1.1 lang:makefile
Test: cs robolectric/3.4.2 lang:makefile
Test: cs robolectric/3.5.1 lang:makefile
Change-Id: I0548a6687347872eca630e8a1f8f0232c390048d
375 files changed