Fix warnings

sqlx-core/src/net/tls/mod.rs

@@ -230,7 +230,9 @@ where
             #[cfg(all(not(feature = "_rt-async-std"), feature = "_tls-native-tls"))]
             MaybeTlsStream::Tls(s) => s.get_ref().get_ref().get_ref(),
 
-            MaybeTlsStream::Upgrading => panic!(io::Error::from(io::ErrorKind::ConnectionAborted)),
+            MaybeTlsStream::Upgrading => {
+                panic!("{}", io::Error::from(io::ErrorKind::ConnectionAborted))
+            }
         }
     }
 }
@@ -252,7 +254,9 @@ where
             #[cfg(all(not(feature = "_rt-async-std"), feature = "_tls-native-tls"))]
             MaybeTlsStream::Tls(s) => s.get_mut().get_mut().get_mut(),
 
-            MaybeTlsStream::Upgrading => panic!(io::Error::from(io::ErrorKind::ConnectionAborted)),
+            MaybeTlsStream::Upgrading => {
+                panic!("{}", io::Error::from(io::ErrorKind::ConnectionAborted))
+            }
         }
     }
 }

sqlx-core/src/sqlite/options/auto_vacuum.rs

@@ -1,5 +1,3 @@
-use std::str::FromStr;
-
 #[derive(Debug, Clone)]
 pub enum SqliteAutoVacuum {
     None,

sqlx-core/src/sqlite/options/locking_mode.rs

@@ -1,5 +1,3 @@
-use std::str::FromStr;
-
 #[derive(Debug, Clone)]
 pub enum SqliteLockingMode {
     Normal,

sqlx-rt/src/lib.rs

@@ -75,7 +75,7 @@ mod tokio_runtime {
     where
         F: FnOnce() -> R,
     {
-        RUNTIME.enter();
+        let _rt = RUNTIME.enter();
         f()
     }
 }