Go: Remove invalid-go-toolchain-version from test expectations

This is reasonable because the tests use a new enough toolchain

Author: mbg

go/ql/integration-tests/diagnostics/invalid-toolchain-version/diagnostics.expected

@@ -1,20 +1,3 @@
-{
-  "location": {
-    "file": "go.mod"
-  },
-  "markdownMessage": "As of Go 1.21, toolchain versions [must use the 1.N.P syntax](https://go.dev/doc/toolchain#version).\n\n`1.21` in `go.mod` does not match this syntax and there is no additional `toolchain` directive, which may cause some `go` commands to fail.",
-  "severity": "warning",
-  "source": {
-    "extractorName": "go",
-    "id": "go/autobuilder/invalid-go-toolchain-version",
-    "name": "Invalid Go toolchain version"
-  },
-  "visibility": {
-    "cliSummaryTable": true,
-    "statusPage": true,
-    "telemetry": true
-  }
-}
 {
   "markdownMessage": "A single `go.mod` file was found.\n\n`go.mod`",
   "severity": "note",

go/ql/integration-tests/go-version-bump/diagnostics.expected

@@ -1,20 +1,3 @@
-{
-  "location": {
-    "file": "go.mod"
-  },
-  "markdownMessage": "As of Go 1.21, toolchain versions [must use the 1.N.P syntax](https://go.dev/doc/toolchain#version).\n\n`1.21` in `go.mod` does not match this syntax and there is no additional `toolchain` directive, which may cause some `go` commands to fail.",
-  "severity": "warning",
-  "source": {
-    "extractorName": "go",
-    "id": "go/autobuilder/invalid-go-toolchain-version",
-    "name": "Invalid Go toolchain version"
-  },
-  "visibility": {
-    "cliSummaryTable": true,
-    "statusPage": true,
-    "telemetry": true
-  }
-}
 {
   "markdownMessage": "A single `go.mod` file was found.\n\n`go.mod`",
   "severity": "note",

go/ql/integration-tests/resolve-build-environment/newer-go-needed/diagnostics.expected

@@ -1,20 +1,3 @@
-{
-  "location": {
-    "file": "go.mod"
-  },
-  "markdownMessage": "As of Go 1.21, toolchain versions [must use the 1.N.P syntax](https://go.dev/doc/toolchain#version).\n\n`1.22` in `go.mod` does not match this syntax and there is no additional `toolchain` directive, which may cause some `go` commands to fail.",
-  "severity": "warning",
-  "source": {
-    "extractorName": "go",
-    "id": "go/autobuilder/invalid-go-toolchain-version",
-    "name": "Invalid Go toolchain version"
-  },
-  "visibility": {
-    "cliSummaryTable": true,
-    "statusPage": true,
-    "telemetry": true
-  }
-}
 {
   "markdownMessage": "A single `go.mod` file was found.\n\n`go.mod`",
   "severity": "note",