Disable cargo commands

--- a/meson.build
+++ b/meson.build
@@ -1,6 +1,6 @@
 project(
     'rnote',
-    ['rust', 'cpp'],
+    ['cpp'],
     version: '0.11.0',
     meson_version: '>= 1.0',
 )
@@ -70,7 +70,6 @@
 dependency('gio-2.0', version: '>= 2.76')
 dependency('cairo', version: '>= 1.18')
 
-cargo = find_program('cargo', required: true)
 # cmake is needed by the "ink-stroke-modeler-rs" bindings crate to build the C++ library
 find_program('cmake', required: true)
 find_program('glib-compile-resources', required: true)
@@ -108,7 +107,7 @@
 subdir('crates/rnote-compose')
 subdir('crates/rnote-engine')
 
-
+if false
 # cargo fmt check
 run_target(
     'cargo-fmt-check',
@@ -157,6 +156,7 @@
     ],
     env: cargo_env,
 )
+endif
 
 # build/install the ui
 if build_ui == true
@@ -198,6 +198,7 @@
         ui_output = app_name
     endif
 
+if false
     # ui cargo check
     run_target(
         'ui-cargo-check',
@@ -251,6 +252,7 @@
             meson.project_build_root() / '@OUTPUT@',
         ],
     )
+endif
 
     meson.add_install_script(
         'build-aux/meson_post_install.py',
@@ -263,7 +265,7 @@
         glib_compile_schemas: true,
         gtk_update_icon_cache: true,
         update_desktop_database: true,
-        update_mime_database: true,
+        update_mime_database: false,
     )
 
     # Windows installer