e2e: remove 1.15 based test enablement in cephfs

Considering we are far out of these release and only care about
kubernetes releases from v1.20, there is no need to have this
version check in place for the tests.

Signed-off-by: Humble Chirammal <hchiramm@redhat.com>

e2e/cephfs.go

@@ -602,12 +602,9 @@ var _ = Describe("cephfs", func() {
 			})
 
 			By("Resize PVC and check application directory size", func() {
-				// Resize 0.3.0 is only supported from v1.15+
-				if k8sVersionGreaterEquals(f.ClientSet, 1, 15) {
-					err := resizePVCAndValidateSize(pvcPath, appPath, f)
-					if err != nil {
-						e2elog.Failf("failed to resize PVC with error %v", err)
-					}
+				err := resizePVCAndValidateSize(pvcPath, appPath, f)
+				if err != nil {
+					e2elog.Failf("failed to resize PVC with error %v", err)
 				}
 			})