docs: remove deprecated "go" option for staticcheck

The default value is always overridden by the global "run.go:".

Author: alexandear

.golangci.reference.yml

@@ -770,10 +770,6 @@ linters-settings:
       local_replace_directives: false
 
   gosimple:
-    # Select the Go version to target.
-    # Default: 1.13
-    # Deprecated: use the global `run.go` instead.
-    go: "1.15"
     # Sxxxx checks in https://staticcheck.io/docs/configuration/options/#checks
     # Default: ["*"]
     checks: [ "all" ]
@@ -1685,19 +1681,11 @@ linters-settings:
       - github.com/jmoiron/sqlx
 
   staticcheck:
-    # Select the Go version to target.
-    # Default: "1.13"
-    # Deprecated: use the global `run.go` instead.
-    go: "1.15"
     # SAxxxx checks in https://staticcheck.io/docs/configuration/options/#checks
     # Default: ["*"]
     checks: [ "all" ]
 
   stylecheck:
-    # Select the Go version to target.
-    # Default: 1.13
-    # Deprecated: use the global `run.go` instead.
-    go: "1.15"
     # STxxxx checks in https://staticcheck.io/docs/configuration/options/#checks
     # Default: ["*"]
     checks: [ "all", "-ST1000", "-ST1003", "-ST1016", "-ST1020", "-ST1021", "-ST1022" ]