build: remove generation of the version

We had drifted in the version management.  Rather than risking the
divergence between CMake and SPM in the future, prefer to just have a
single manually maintained version of the version header.

Author: compnerd

Package.swift

@@ -42,7 +42,6 @@ let package = Package(
             "scanners.re",
             "libcmark-gfm.pc.in",
             "CMakeLists.txt",
-            "cmark-gfm_version.h.in",
           ],
           cSettings: cSettings
         ),

src/CMakeLists.txt

@@ -1,10 +1,3 @@
-set(PROJECT_VERSION_MAJOR 0)
-set(PROJECT_VERSION_MINOR 29)
-set(PROJECT_VERSION_PATCH 0)
-set(PROJECT_VERSION_GFM 13)
-configure_file(${CMAKE_CURRENT_SOURCE_DIR}/cmark-gfm_version.h.in
-  ${CMAKE_CURRENT_BINARY_DIR}/cmark-gfm_version.h)
-
 configure_file(${CMAKE_CURRENT_SOURCE_DIR}/libcmark-gfm.pc.in
   ${CMAKE_CURRENT_BINARY_DIR}/libcmark-gfm.pc @ONLY)
 

src/cmark-gfm_version.h.in

@@ -1,7 +1,7 @@
 #ifndef CMARK_GFM_VERSION_H
 #define CMARK_GFM_VERSION_H
 
-#define CMARK_GFM_VERSION ((0 << 24) | (29 << 16) | (0 << 8) | 0)
-#define CMARK_GFM_VERSION_STRING "0.29.0.gfm.0"
+#define CMARK_GFM_VERSION ((0 << 24) | (29 << 16) | (0 << 8) | 13)
+#define CMARK_GFM_VERSION_STRING "0.29.0.gfm.13"
 
 #endif