aws_s3: do not test bucket name with a dot

The bucket_name variable length is 63 or below. If we add a prefix we
can generate an invalid bucket name.

In addition, the test has little value since it just ensures end-point
behaves as expected. The code coverage in the module itself remains
the same.

See: https://docs.aws.amazon.com/AmazonS3/latest/userguide/bucketnamingrules.html

tests/integration/targets/aws_s3/tasks/main.yml

@@ -442,36 +442,6 @@
         that:
           - result is changed
 
-    - name: test create a bucket with a dot in the name
-      aws_s3:
-        bucket: "{{ bucket_name + '.bucket' }}"
-        mode: create
-      register: result
-
-    - assert:
-        that:
-          - result is changed
-
-    - name: test delete a bucket with a dot in the name
-      aws_s3:
-        bucket: "{{ bucket_name + '.bucket' }}"
-        mode: delete
-      register: result
-
-    - assert:
-        that:
-          - result is changed
-
-    - name: test delete a nonexistent bucket
-      aws_s3:
-        bucket: "{{ bucket_name + '.bucket' }}"
-        mode: delete
-      register: result
-
-    - assert:
-        that:
-          - result is not changed
-
     - name: make tempfile 4 GB for OSX
       command:
         _raw_params: "dd if=/dev/zero of={{ tmpdir.path }}/largefile bs=1m count=4096"