github: remove stale comments indicating action versions

Dependabot doesn't update the comments, so they go stale very quickly.

.github/workflows/build.yml

@@ -78,8 +78,8 @@ jobs:
     continue-on-error: ${{ matrix.checks == 'advisories' }}
 
     steps:
-    - uses: actions/checkout@2541b1294d2704b0964813337f33b291d3f8596b # v2
-    - uses: EmbarkStudios/cargo-deny-action@7257a18a9c2fe3f92b85d41ae473520dff953c97 # v1.3.2
+    - uses: actions/checkout@2541b1294d2704b0964813337f33b291d3f8596b
+    - uses: EmbarkStudios/cargo-deny-action@7257a18a9c2fe3f92b85d41ae473520dff953c97
       with:
         command: check ${{ matrix.checks }}
 

.github/workflows/scorecards.yml

@@ -27,7 +27,7 @@ jobs:
           persist-credentials: false
 
       - name: "Run analysis"
-        uses: ossf/scorecard-action@865b4092859256271290c77adbd10a43f4779972 # v1.0.4
+        uses: ossf/scorecard-action@865b4092859256271290c77adbd10a43f4779972
         with:
           results_file: results.sarif
           results_format: sarif
@@ -42,7 +42,7 @@ jobs:
 
       # Upload the results as artifacts (optional).
       - name: "Upload artifact"
-        uses: actions/upload-artifact@3cea5372237819ed00197afe530f5a7ea3e805c8 # v2.3.1
+        uses: actions/upload-artifact@3cea5372237819ed00197afe530f5a7ea3e805c8
         with:
           name: SARIF file
           path: results.sarif
@@ -50,6 +50,6 @@ jobs:
 
       # Upload the results to GitHub's code scanning dashboard.
       - name: "Upload to code-scanning"
-        uses: github/codeql-action/upload-sarif@904260d7d935dff982205cbdb42025ce30b7a34f # v1.0.26
+        uses: github/codeql-action/upload-sarif@904260d7d935dff982205cbdb42025ce30b7a34f
         with:
           sarif_file: results.sarif