Remove cargo_dev dependency

Author: Serial-ATA

clippy_lints/Cargo.toml

@@ -10,7 +10,6 @@ edition = "2021"
 
 [dependencies]
 cargo_metadata = "0.14"
-clippy_dev = { path = "../clippy_dev", optional = true }
 clippy_utils = { path = "../clippy_utils" }
 if_chain = "1.0"
 itertools = "0.10.1"
@@ -32,7 +31,7 @@ url = { version = "2.2", features = ["serde"] }
 [features]
 deny-warnings = ["clippy_utils/deny-warnings"]
 # build clippy with internal lints enabled, off by default
-internal = ["clippy_utils/internal", "serde_json", "tempfile", "clippy_dev"]
+internal = ["clippy_utils/internal", "serde_json", "tempfile"]
 
 [package.metadata.rust-analyzer]
 # This crate uses #[feature(rustc_private)]

clippy_lints/src/utils/internal_lints/metadata_collector.rs

@@ -191,7 +191,12 @@ impl MetadataCollector {
             lints: BinaryHeap::<LintMetadata>::default(),
             applicability_info: FxHashMap::<String, ApplicabilityInfo>::default(),
             config: collect_configs(),
-            clippy_project_root: clippy_dev::clippy_project_root(),
+            clippy_project_root: std::env::current_dir()
+                .expect("failed to get current dir")
+                .ancestors()
+                .nth(1)
+                .expect("failed to get project root")
+                .to_path_buf(),
         }
     }