build: --credential-file-override is no longer required (#200)

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Source-Link: googleapis/synthtool@94421c4

packages/google-cloud-recaptchaenterprise/synth.metadata

@@ -4,7 +4,7 @@
       "git": {
         "name": ".",
         "remote": "https://github.com/googleapis/nodejs-recaptcha-enterprise.git",
-        "sha": "7790462f551238d692442b8924bc257773bf16dc"
+        "sha": "569c5da14e8b7c9a6f98eb0ed977a1f0d5e114cc"
       }
     },
     {
@@ -19,7 +19,7 @@
       "git": {
         "name": "synthtool",
         "remote": "https://github.com/googleapis/synthtool.git",
-        "sha": "5936421202fb53ed4641bcb824017dd393a3dbcc"
+        "sha": "94421c47802f56a44c320257b2b4c190dc7d6b68"
       }
     }
   ],