Remove executable jar from distribution

It doesn't get used much and it has way too many optional dependencies
in it now.

docs/src/main/asciidoc/quickstart.adoc

@@ -5,9 +5,9 @@ $ cd spring-cloud-config-server
 $ mvn spring-boot:run
 ----
 
-The server is a Spring Boot application so you can build the jar file
-and run that (`java -jar ...`) or pull it down from a Maven
-repository. Then try it out as a client:
+The server is a Spring Boot application so you can run it from your
+IDE instead if you prefer (the main class is
+`ConfigServerApplication`). Then try it out a client:
 
 ----
 $ curl localhost:8888/foo/development

docs/src/main/asciidoc/spring-cloud-config.adoc

@@ -40,10 +40,10 @@ to use your own `application.properties`, e.g.
 [source,properties]
 ----
 server.port: 8888
-spring.cloud.config.server.git.uri: file://${HOME}/config-repo
+spring.cloud.config.server.git.uri: file://${user.home}/config-repo
 ----
 
-where `${HOME}/config-repo` is a git repository containing
+where `${user.home}/config-repo` is a git repository containing
 YAML and properties files.
 
 [TIP]