Remove some redundant code from modes inheriting from special-mode

All of those were making their buffers read-only explicitly, but that
behaviour is automatically inherited from special-mode.

Author: bbatsov

cider-browse-ns.el

@@ -70,7 +70,6 @@
   "Major mode for browsing Clojure namespaces.
 
 \\{cider-browse-ns-mode-map}"
-  (setq buffer-read-only t)
   (setq-local electric-indent-chars nil)
   (when cider-special-mode-truncate-lines
     (setq-local truncate-lines t))

cider-browse-spec.el

@@ -78,7 +78,6 @@ For example: (\":ring.request/header-name\" \":ring.request/headers\" \":ring/re
   "Major mode for browsing Clojure specs.
 
 \\{cider-browse-spec-mode-map}"
-  (setq buffer-read-only t)
   (setq-local electric-indent-chars nil)
   (when cider-special-mode-truncate-lines
     (setq-local truncate-lines t)))

cider-classpath.el

@@ -49,7 +49,6 @@
   "Major mode for browsing the entries in Java's classpath.
 
 \\{cider-classpath-mode-map}"
-  (setq buffer-read-only t)
   (setq-local electric-indent-chars nil)
   (when cider-special-mode-truncate-lines
     (setq-local truncate-lines t)))

cider-inspector.el

@@ -85,7 +85,6 @@ The page size can be also changed interactively within the inspector."
 
 \\{cider-inspector-mode-map}"
   (set-syntax-table clojure-mode-syntax-table)
-  (setq buffer-read-only t)
   (setq-local electric-indent-chars nil)
   (when cider-special-mode-truncate-lines
     (setq-local truncate-lines t)))

cider-stacktrace.el

@@ -230,7 +230,6 @@ The error types are represented as strings."
   "Major mode for filtering and navigating CIDER stacktraces.
 
 \\{cider-stacktrace-mode-map}"
-  (setq buffer-read-only t)
   (when cider-special-mode-truncate-lines
     (setq-local truncate-lines t))
   (setq-local electric-indent-chars nil)

nrepl-client.el

@@ -1095,7 +1095,6 @@ operations.")
   "Major mode for displaying nREPL messages.
 
 \\{nrepl-messages-mode-map}"
-  (setq buffer-read-only t)
   (when cider-special-mode-truncate-lines
     (setq-local truncate-lines t))
   (setq-local electric-indent-chars nil)