Rip out scalafmt from the CI pipeline

How can Scala people be satisfied with such a defective tool? It takes
all the bad parts of clang-format and none of the good ones. It can't
even enfore the official Scala style guide!

Anyway, I'm open to adding it back as long as it's set up to only check
files that have been modified in a MR or a commit. But I, personally,
don't feel like digging through giant piles of yaml to accomplish that.

.gitlab-ci.yml

@@ -29,13 +29,14 @@ test:
   script:
     - sbt test
 
-scalafmt:
-  stage: test
-  allow_failure: true
-  before_script:
-    - sbt -v sbtVersion
-  script:
-    - sbt scalafmtCheckAll
+# Rest in piece.
+#scalafmt:
+#  stage: test
+#  allow_failure: true
+#  before_script:
+#    - sbt -v sbtVersion
+#  script:
+#    - sbt scalafmtCheckAll
 
 build:
   stage: build