Removed unused ldc.conf.in.

It would only be used during in-tree building of Tango, ldc_install.conf.in is what ends up being used during make install instead.

ldc.conf.in

@@ -1,22 +0,0 @@
-// This configuration file uses libconfig.
-// See http://www.hyperrealm.com/libconfig/ for syntax details.
-
-// Special macros:
-// %%ldcbinarypath%%
-//  - is replaced with the path to the directory holding the ldc executable
-
-// The default group is required
-default:
-{
-    // 'switches' holds array of string that are appends to the command line
-    // arguments before they are parsed.
-    switches = [
-        "-I@RUNTIME_DIR@",
-        "-I@RUNTIME_DIR@/tango/core/vendor",
-        "-L-L%%ldcbinarypath%%/../lib",
-        "-L-ltango",
-        "-d-version=Tango",
-        "-defaultlib=@RUNTIME_AIO@",
-        "-debuglib=@RUNTIME_AIO@"
-    ];
-};