Revert "Look inside synonyms for foralls when unifying"
As discussed in #10194, this patch - while fixing a bug - also causes a minor regression when compiling certain in-the-wild programs, meaning some extant programs now failed with 7.10.2 RC1. Womp womp. This reverts commit 681d82c0.
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- compiler/typecheck/TcType.hs 3 additions, 7 deletionscompiler/typecheck/TcType.hs
- compiler/typecheck/TcUnify.hs 1 addition, 4 deletionscompiler/typecheck/TcUnify.hs
- testsuite/tests/typecheck/should_fail/T10194.hs 0 additions, 7 deletionstestsuite/tests/typecheck/should_fail/T10194.hs
- testsuite/tests/typecheck/should_fail/T10194.stderr 0 additions, 7 deletionstestsuite/tests/typecheck/should_fail/T10194.stderr
- testsuite/tests/typecheck/should_fail/all.T 0 additions, 1 deletiontestsuite/tests/typecheck/should_fail/all.T
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