Fixed most of the clippy warnings/suggestions.

kernel/src/arch/x86_64/memory.rs

@@ -1,12 +1,18 @@
-use lib_alloc::allocator::FoundryAllocator;
+// use lib_alloc::allocator::FoundryAllocator;
 use limine::{memory_map::EntryType, response::MemoryMapResponse};
 use x86_64::{
-    addr,
+    // addr,
     registers::control::Cr3,
     structures::paging::{
-        page_table::FrameError, FrameAllocator, OffsetPageTable, PageTable, PhysFrame, Size4KiB,
+        // page_table::FrameError,
+        FrameAllocator,
+        OffsetPageTable,
+        PageTable,
+        PhysFrame,
+        Size4KiB,
     },
-    PhysAddr, VirtAddr,
+    PhysAddr,
+    VirtAddr,
 };
 
 /// Returns a mutable reference to the current level 4 page table.
@@ -93,7 +99,6 @@ unsafe impl FrameAllocator<Size4KiB> for FoundryOSFrameAllocator {
     ///
     /// - `Some(PhysFrame)`: If a usable frame is available.
     /// - `None`: If there are no more usable frames to allocate.
-
     fn allocate_frame(&mut self) -> Option<PhysFrame> {
         let frame = self.usable_frames().nth(self.next);
         self.next += 1;