MIPS: Remove clang-format-off from assembler tests.

test/cctest/test-assembler-mips64.cc

Index: test/cctest/test-assembler-mips64.cc
diff --git a/test/cctest/test-assembler-mips64.cc b/test/cctest/test-assembler-mips64.cc
index e8674a4c326e7209e83b2b7d6f942f13b78a35cb..5bdac0012f9973c8f5a33fc991bdbe70b895ba34 100644
--- a/test/cctest/test-assembler-mips64.cc
+++ b/test/cctest/test-assembler-mips64.cc
@@ -47,8 +47,6 @@ typedef Object* (*F2)(int x, int y, int p2, int p3, int p4);
 typedef Object* (*F3)(void* p, int p1, int p2, int p3, int p4);
 typedef Object* (*F4)(int64_t x, int64_t y, int64_t p2, int64_t p3, int64_t p4);
 
-// clang-format off
-
 
 #define __ assm.