Temporarly move radare2 dependency to ensure pipelines work

.gitlab-ci.yml

@@ -6,6 +6,7 @@ before_script:
 
 .test_template: &test
   script:
+    - apt-get -q -y install --no-install-recommends radare2 || true
     - py.test-3 -vv -l -r a --cov=diffoscope --cov-report=term-missing
 
 unstable:

debian/control

@@ -76,7 +76,6 @@ Build-Depends:
  python3-setuptools,
  python3-tlsh (>= 3.4.1) <!nocheck>,
  r-base-core <!nocheck>,
- radare2 <!nocheck>,
  rpm2cpio <!nocheck>,
  sng <!nocheck>,
  sqlite3 <!nocheck>,