Revert "Run codecov on PR and bump range (#633)"

This reverts commit 02b800e.

Author: Matt Ramotar

.codecov.yml

@@ -1,5 +1,5 @@
 coverage:
-  range: 70..80
+  range: 50..80
   round: down
   precision: 2
 

.github/workflows/check.yml

@@ -14,4 +14,14 @@ jobs:
       - name: Setup Gradle
         uses: gradle/gradle-build-action@v2
       - name: Run check with Gradle Wrapper
-        run: ./gradlew check
+        run: ./gradlew check
+
+  coverage:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@master
+      - uses: codecov/codecov-action@v3
+        with:
+          files: ./kover/coverage.xml
+          name: codecov-umbrella
+          verbose: true