Remove perf alias/clojure.java.jdbc dependency

I'll create a specific performance test suite again in the future.

CONTRIBUTING.md

@@ -1,9 +1,9 @@
 # next.jdbc
 
 The next generation of [`clojure.java.jdbc`](https://github.com/clojure/java.jdbc)
-is *not yet accepting contributions* because it is exploratory work and I do
-not know yet whether it will be a Contrib project (like `clojure.java.jdbc`)
-or whether it will be a public, open source project.
+is *not yet accepting contributions* because it I do
+not know yet whether it will become a Contrib project (like `clojure.java.jdbc`)
+or whether it will continue to be a public, open source project.
 
 Please do not send Pull Requests at this point!
 

deps.edn

@@ -14,11 +14,6 @@
                       org.xerial/sqlite-jdbc {:mvn/version "3.23.1"}
                       ;; Note: Assumes Java 8; there's a .jre7 version as well
                       com.microsoft.sqlserver/mssql-jdbc {:mvn/version "6.2.2.jre8"}}}
-  :perf {:extra-deps {criterium {:mvn/version "0.4.4"}
-                      org.clojure/java.jdbc {:mvn/version "0.7.9"}}
-         :jvm-opts ["-server"
-                    "-Xmx4096m"
-                    "-Dclojure.compiler.direct-linking=true"]}
   :runner
   {:extra-deps {com.cognitect/test-runner
                 {:git/url "https://github.com/cognitect-labs/test-runner"