Update Provenance config to remove Kafka dependency (#157)

Kafka is no longer required for building Provenance (thankfully).

Co-authored-by: Andrew Gouin <[email protected]>

chains.yaml

@@ -801,14 +801,6 @@
   github-repo: provenance
   dockerfile: cosmos
   build-target: make install
-  pre-build: |
-    apk add --no-cache g++
-    git clone https://github.com/edenhill/librdkafka.git
-    cd librdkafka
-    git checkout v1.8.2
-    ./configure
-    make
-    make install
   binaries:
     - /go/bin/provenanced
   build-env: