Remove --enable-local option

This has been useless since the removal of `recipe.active` and
the tweaks of `LDFLAGS` are no longer necessary when using extconf's
options.

Author: luislavena

ext/sqlite3/extconf.rb

@@ -9,11 +9,6 @@
 # --with-sqlite3-{dir,include,lib}
 dir_config("sqlite3")
 
-# prioritize local builds
-if enable_config("local", false)
-  $LDFLAGS = ENV.fetch("LDFLAGS", "")
-end
-
 if RbConfig::CONFIG["host_os"] =~ /mswin/
   $CFLAGS << ' -W3'
 end

tasks/native.rake

@@ -33,7 +33,6 @@ RUBY_EXTENSION = Rake::ExtensionTask.new('sqlite3_native', HOE.spec) do |ext|
     # define target for extension (supporting fat binaries)
     RUBY_VERSION =~ /(\d+\.\d+)/
     ext.lib_dir = "lib/sqlite3/#{$1}"
-    ext.config_options << "--enable-local"
   else
 
     # detect cross-compiler available