Revert "Update requirements.txt"

This reverts commit 8fea3ca.

Author: cecilialau6776

requirements.txt

@@ -42,6 +42,8 @@ cryptography==37.0.2
 csh-ldap==2.3.1
     # via -r requirements.in
 ddsketch==2.0.3
+    # via ddtrace
+ddtrace==1.1.4
     # via -r requirements.in
 dnspython==2.2.1
     # via srvlookup