Remove cfr from dependencyManagement for now

It isn't yet used, and I cfr still needs some work (or we need to
provide it with nicer code) before it's good enough to bundle with the
deobfuscator.

pom.xml

@@ -43,11 +43,6 @@
         <artifactId>guava</artifactId>
         <version>28.0-jre</version>
       </dependency>
-      <dependency>
-        <groupId>org.benf</groupId>
-        <artifactId>cfr</artifactId>
-        <version>0.145</version>
-      </dependency>
       <dependency>
         <groupId>org.ow2.asm</groupId>
         <artifactId>asm</artifactId>