Remove go.mod because I guess I do'nt know how go modules work still

Author: evanphx

.github/workflows/go.yml

@@ -12,14 +12,19 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v2
+      with:
+        fetch-depth: 1
+        path: go/src/github.com/evanphx/json-patch
 
     - name: Set up Go
       uses: actions/setup-go@v2
       with:
         go-version: 1.15
 
-    - name: Setup
-      run: go get
-
     - name: Test
-      run: go test -v ./...
+      run: |
+        cd /home/runner/work/json-patch/json-patch/go/src/github.com/evanphx/json-patch
+        go get ./...
+        go test -v ./...
+      env:
+        GOPATH: /home/runner/work/json-patch/json-patch/go