Kernel: Use Vector::unstable_remove() in a couple of places

Kernel/FileSystem/VirtualFileSystem.cpp

@@ -73,7 +73,7 @@ KResult VFS::unmount(InodeIdentifier guest_inode_id)
                 return result;
             }
             dbg() << "VFS: found fs " << mount.guest_fs().fsid() << " at mount index " << i << "! Unmounting...";
-            m_mounts.remove(i);
+            m_mounts.unstable_remove(i);
             return KSuccess;
         }
     }

Kernel/Process.cpp

@@ -185,7 +185,7 @@ bool Process::deallocate_region(Region& region)
     InterruptDisabler disabler;
     for (int i = 0; i < m_regions.size(); ++i) {
         if (&m_regions[i] == &region) {
-            m_regions.remove(i);
+            m_regions.unstable_remove(i);
             return true;
         }
     }
@@ -757,7 +757,7 @@ int Process::do_exec(NonnullRefPtr<FileDescription> main_program_description, Ve
                 prot |= PROT_READ;
             if (is_writable)
                 prot |= PROT_WRITE;
-            if (auto* region = allocate_region(vaddr.offset(totally_random_offset), size, String(name), prot)) 
+            if (auto* region = allocate_region(vaddr.offset(totally_random_offset), size, String(name), prot))
                 return region->vaddr().as_ptr();
             return nullptr;
         };

Kernel/SharedBuffer.cpp

@@ -99,7 +99,7 @@ void SharedBuffer::deref_for_process(Process& process)
                 dbgprintf("Releasing shared buffer reference on %d of size %d by PID %d\n", m_shared_buffer_id, size(), process.pid());
 #endif
                 process.deallocate_region(*ref.region);
-                m_refs.remove(i);
+                m_refs.unstable_remove(i);
 #ifdef SHARED_BUFFER_DEBUG
                 dbgprintf("Released shared buffer reference on %d of size %d by PID %d\n", m_shared_buffer_id, size(), process.pid());
 #endif
@@ -124,7 +124,7 @@ void SharedBuffer::disown(pid_t pid)
             dbgprintf("Disowning shared buffer %d of size %d by PID %d\n", m_shared_buffer_id, size(), pid);
 #endif
             m_total_refs -= ref.count;
-            m_refs.remove(i);
+            m_refs.unstable_remove(i);
 #ifdef SHARED_BUFFER_DEBUG
             dbgprintf("Disowned shared buffer %d of size %d by PID %d\n", m_shared_buffer_id, size(), pid);
 #endif