Retire {fmt} (#36)

As of now, fcitx5/libime/fcitx5-chinese-addons/libime-jyutping have all been updated to C++ 20 and no longer requre fmt to build

Author: rocka

.gitmodules

@@ -1,6 +1,3 @@
-[submodule "fmt"]
-	path = fmt
-	url = https://github.com/fmtlib/fmt
 [submodule "libuv"]
 	path = libuv
 	url = https://github.com/libuv/libuv

README.md

@@ -26,7 +26,6 @@ both can be installed with `sdkmanager` command line tool.
 ## Libraries
 
 * boost: [moritz-wundke/Boost-for-Android](https://github.com/moritz-wundke/Boost-for-Android)
-* fmt: [fmtlib/fmt](https://github.com/fmtlib/fmt)
 * libevent: [libevent/libevent](https://github.com/libevent/libevent/tree/release-2.1.12-stable)
 * libintl-lite: [j-jorge/libintl-lite](https://github.com/j-jorge/libintl-lite)
 * libime data: [fcitx/libime](https://github.com/fcitx/libime)

fmt

@@ -25,7 +25,6 @@ executable prebuilder
     Rules.AnthyData
     Rules.Boost
     Rules.Fcitx5
-    Rules.Fmt
     Rules.GLog
     Rules.LevelDB
     Rules.LibChewing

prebuilder.cabal

@@ -16,7 +16,6 @@ import Development.Shake.Config
 import Rules.AnthyData
 import Rules.Boost
 import Rules.Fcitx5
-import Rules.Fmt
 import Rules.GLog
 import Rules.LevelDB
 import Rules.LibChewing
@@ -54,7 +53,6 @@ main = do
       libIMERule
       chineseAddonsRule
       libIMEJyutpingRule
-      fmtRule
       libuvRule
       libintlLiteRule
       luaRule
@@ -78,7 +76,6 @@ main = do
         let artifacts =
               [ "spell-dict",
                 "libime",
-                "fmt",
                 "chinese-addons-data",
                 "libime-jyutping",
                 "libuv",
@@ -104,8 +101,7 @@ main = do
         getToolchainVersions >>= writeFile' (outputDir </> "toolchain-versions.json") . TL.unpack . TLB.toLazyText . A.encodePrettyToTextBuilder
       "fcitx5" ~> do
         need
-          [ "fmt",
-            "libuv",
+          [ "libuv",
             "libintl-lite"
           ]
       "app" ~> do