chore(bazel): update Go generator version to v0.31.1

Google APIs · copybara-github · commit d3dbd87a2d64 · 2022-07-14T13:38:01.000-07:00
Changes include:
- regapic: fix unused imports
- regapic: fix missing return statement

PiperOrigin-RevId: 461039619
diff --git a/WORKSPACE b/WORKSPACE
@@ -124,7 +124,7 @@ http_archive(
     ],
 )
 
-_gapic_generator_go_version = "0.31.0"
+_gapic_generator_go_version = "0.31.1"
 
 http_archive(
     name = "com_googleapis_gapic_generator_go",

Original file line number	Diff line number	Diff line change
`@@ -124,7 +124,7 @@ http_archive(`
`124`	`124`	`],`
`125`	`125`	`)`
`126`	`126`
`127`		`-_gapic_generator_go_version = "0.31.0"`
	`127`	`+_gapic_generator_go_version = "0.31.1"`
`128`	`128`
`129`	`129`	`http_archive(`
`130`	`130`	`name = "com_googleapis_gapic_generator_go",`