Bug 1518703 - Remove R_386_PC32 check. r=froydnj,ted

The test is actually redundant with the TEXTREL check in
check_binary.py (R_386_PC32 relocations will only happen as text
relocations)

Differential Revision: https://phabricator.services.mozilla.com/D16002

--HG--
extra : moz-landing-system : lando

Makefile.in

@@ -292,13 +292,6 @@ endif # NO_PROFILE_GUIDED_OPTIMIZE
 
 .PHONY: maybe_clobber_profiledbuild
 
-# Look for R_386_PC32 relocations in shared libs, these
-# break x86_64 builds and SELinux users.
-ifeq ($(OS_TARGET)_$(TARGET_XPCOM_ABI),Linux_x86-gcc3)
-check::
-	@relcount=`find $(DIST)/bin -name '*.so' | xargs objdump -R | grep R_386_PC32 | wc -l` && if test $$relcount -gt 0; then echo 'FAILED: R_386_PC32 relocations detected in a shared library.  Did you use a system header without adding it to config/system-headers?'; exit 1; else echo 'PASSED'; fi
-endif
-
 ifdef JS_STANDALONE
 # Delegate js-specific rules to js
 check-%: