remove install step from java job

Author: Benjosh95

.github/workflows/sdk-pr.yaml

@@ -114,10 +114,6 @@ jobs:
         run: make download-oas
       - name: Generate SDK
         run: make generate-sdk LANGUAGE=java
-      - name: Install Java SDK
-        working-directory: ./sdk-repo-updated
-        run: |
-          make install-dev
       - name: Push Java SDK
         env:
           GH_REPO: "stackitcloud/stackit-sdk-java"