Rust: Remove unit test already covered in "rust/4 polyglot"

test cases/failing/53 wrong shared crate type/meson.build

@@ -1,7 +0,0 @@
-project('test')
-
-if not add_languages('rust', required: false)
-  error('MESON_SKIP_TEST test requires rust compiler')
-endif
-
-shared_library('mytest', 'foo.rs', rust_crate_type : 'staticlib')

test cases/failing/53 wrong shared crate type/test.json

@@ -1,7 +0,0 @@
-{
-  "stdout": [
-    {
-      "line": "test cases/failing/53 wrong shared crate type/meson.build:7:0: ERROR: Crate type \"staticlib\" invalid for dynamic libraries; must be \"dylib\", \"cdylib\", or \"proc-macro\""
-    }
-  ]
-}

test cases/failing/54 wrong static crate type/meson.build

@@ -1,7 +0,0 @@
-project('test')
-
-if not add_languages('rust', required: false)
-  error('MESON_SKIP_TEST test requires rust compiler')
-endif
-
-static_library('mytest', 'foo.rs', rust_crate_type : 'cdylib')

test cases/failing/54 wrong static crate type/test.json

@@ -1,7 +0,0 @@
-{
-  "stdout": [
-    {
-      "line": "test cases/failing/54 wrong static crate type/meson.build:7:0: ERROR: Crate type \"cdylib\" invalid for static libraries; must be \"rlib\" or \"staticlib\""
-    }
-  ]
-}