ci: remove validate-commit-message tests from travis (#27386)

we alredy run them via bazel.

I also removed a bunch of obsolete files that bazel doesn't need.

PR Close #27386

tools/validate-commit-message/BUILD.bazel

@@ -5,6 +5,5 @@ jasmine_node_test(
     srcs = glob(["*.js"]),
     data = [
         "commit-message.json",
-        "spec/support/jasmine.json",
     ],
 )

tools/validate-commit-message/spec/support/jasmine.json

@@ -1,11 +0,0 @@
-{
-  "spec_dir": "",
-  "spec_files": [
-    "**/*[sS]pec.js"
-  ],
-  "helpers": [
-    "helpers/**/*.js"
-  ],
-  "stopSpecOnExpectationFailure": false,
-  "random": false
-}