fully revert changes to Taskfile variable deduplication

If someone on linux/macOS wanted or needed to change these values, they would have to copy them into the respective file.

It would then be potentially confusing which variable is the source of truth (the OS file wins).

Avoid this unneeded confusion, having the variables copied into the darwin and linux file is not a big deal.

Taskfile.yml

@@ -1,22 +1,7 @@
 version: 3
 
 includes:
-  build:
-    taskfile: ./scripts/tasks/Taskfile_{{OS}}.yml
-    optional: true
-
-# Default vars for Linux/Mac/Unix
-vars:
-  GOALC_BIN_RELEASE_DIR: './build/goalc'
-  GK_BIN_RELEASE_DIR: './build/game'
-  DECOMP_BIN_RELEASE_DIR: './build/decompiler'
-  MEMDUMP_BIN_RELEASE_DIR: './build/tools'
-  TYPESEARCH_BIN_RELEASE_DIR: './build/tools'
-  OFFLINETEST_BIN_RELEASE_DIR: './build'
-  GOALCTEST_BIN_RELEASE_DIR: './build'
-  FORMATTER_BIN_RELEASE_DIR: './build/tools'
-  EXE_FILE_EXTENSION: ''
-  PYTHON: 'python3'
+  build: ./scripts/tasks/Taskfile_{{OS}}.yml
 
 dotenv:
   - ./scripts/tasks/.env

scripts/tasks/Taskfile_darwin.yml

@@ -1,3 +1,13 @@
 version: 3
 
 vars:
+  GOALC_BIN_RELEASE_DIR: './build/goalc'
+  GK_BIN_RELEASE_DIR: './build/game'
+  DECOMP_BIN_RELEASE_DIR: './build/decompiler'
+  MEMDUMP_BIN_RELEASE_DIR: './build/tools'
+  TYPESEARCH_BIN_RELEASE_DIR: './build/tools'
+  OFFLINETEST_BIN_RELEASE_DIR: './build'
+  GOALCTEST_BIN_RELEASE_DIR: './build'
+  FORMATTER_BIN_RELEASE_DIR: './build/tools'
+  EXE_FILE_EXTENSION: ''
+  PYTHON: 'python3'

scripts/tasks/Taskfile_linux.yml

@@ -1,3 +1,13 @@
 version: 3
 
 vars:
+  GOALC_BIN_RELEASE_DIR: './build/goalc'
+  GK_BIN_RELEASE_DIR: './build/game'
+  DECOMP_BIN_RELEASE_DIR: './build/decompiler'
+  MEMDUMP_BIN_RELEASE_DIR: './build/tools'
+  TYPESEARCH_BIN_RELEASE_DIR: './build/tools'
+  OFFLINETEST_BIN_RELEASE_DIR: './build'
+  GOALCTEST_BIN_RELEASE_DIR: './build'
+  FORMATTER_BIN_RELEASE_DIR: './build/tools'
+  EXE_FILE_EXTENSION: ''
+  PYTHON: 'python3'