Remove charset-normalizer version constraint

Change-Id: I46311f74e949270278f685c50576f5884ba96227
Signed-off-by: Gabriel Cuba <gcuba@whitestack.com>
Signed-off-by: Mark Beierl <mark.beierl@canonical.com>
diff --git a/requirements-test.in b/requirements-test.in
index 9d355d8..a0d68c4 100644
--- a/requirements-test.in
+++ b/requirements-test.in
@@ -13,7 +13,7 @@
 #     limitations under the License.
 
 asynctest
-charset-normalizer<3 # Required by aiohttp in LCM
+charset-normalizer
 coverage
 flake8<5.0.0
 mock