Revert "Make lots of tests run in parallel"

This reverts commit 323dc60712.

Reason for revert: Possible cause of test instability
Bug: 170513220
Test: soong tests

Change-Id: Iee168e9fbb4210569e6cffcc23e60d111403abb8

cmd/extract_linker/main_test.go

@@ -51,7 +51,6 @@ var bytesToAsmTestCases = []struct {
 }
 
 func TestBytesToAsm(t *testing.T) {
-	t.Parallel()
 	for _, testcase := range bytesToAsmTestCases {
 		t.Run(testcase.name, func(t *testing.T) {
 			buf := bytes.Buffer{}