Kernel: Make all ProcFS and SysFS files zero-sized

There is no value in exposing particular sizes for these files.

Kernel/Arch/PC/BIOS.h

@@ -70,7 +70,6 @@ protected:
 class DMIEntryPointExposedBlob : public BIOSSysFSComponent {
 public:
     static NonnullRefPtr<DMIEntryPointExposedBlob> create(PhysicalAddress dmi_entry_point, size_t blob_size);
-    virtual size_t size() const override { return m_dmi_entry_point_length; }
 
 private:
     DMIEntryPointExposedBlob(PhysicalAddress dmi_entry_point, size_t blob_size);
@@ -82,7 +81,6 @@ private:
 class SMBIOSExposedTable : public BIOSSysFSComponent {
 public:
     static NonnullRefPtr<SMBIOSExposedTable> create(PhysicalAddress, size_t blob_size);
-    virtual size_t size() const override { return m_smbios_structure_table_length; }
 
 private:
     SMBIOSExposedTable(PhysicalAddress dmi_entry_point, size_t blob_size);

Kernel/FileSystem/ProcFS.cpp

@@ -163,7 +163,7 @@ InodeMetadata ProcFSGlobalInode::metadata() const
     metadata.mode = S_IFREG | m_associated_component->required_mode();
     metadata.uid = m_associated_component->owner_user();
     metadata.gid = m_associated_component->owner_group();
-    metadata.size = m_associated_component->size();
+    metadata.size = 0;
     metadata.mtime = m_associated_component->modified_time();
     return metadata;
 }

Kernel/FileSystem/SysFS.cpp

@@ -119,7 +119,7 @@ InodeMetadata SysFSInode::metadata() const
     metadata.mode = S_IFREG | S_IRUSR | S_IRGRP | S_IROTH;
     metadata.uid = 0;
     metadata.gid = 0;
-    metadata.size = m_associated_component->size();
+    metadata.size = 0;
     metadata.mtime = mepoch;
     return metadata;
 }

Kernel/FileSystem/SysFSComponent.h

@@ -25,7 +25,6 @@ public:
     virtual KResult traverse_as_directory(unsigned, Function<bool(FileSystem::DirectoryEntryView const&)>) const { VERIFY_NOT_REACHED(); }
     virtual RefPtr<SysFSComponent> lookup(StringView) { VERIFY_NOT_REACHED(); };
     virtual KResultOr<size_t> write_bytes(off_t, size_t, UserOrKernelBuffer const&, FileDescription*) { return EROFS; }
-    virtual size_t size() const { return 0; }
 
     virtual NonnullRefPtr<Inode> to_inode(SysFS const&) const;
 

Kernel/ProcessExposed.h

@@ -70,7 +70,6 @@ public:
     virtual KResult traverse_as_directory(unsigned, Function<bool(FileSystem::DirectoryEntryView const&)>) const { VERIFY_NOT_REACHED(); }
     virtual KResultOr<NonnullRefPtr<ProcFSExposedComponent>> lookup(StringView) { VERIFY_NOT_REACHED(); };
     virtual KResultOr<size_t> write_bytes(off_t, size_t, const UserOrKernelBuffer&, FileDescription*) { return KResult(EROFS); }
-    virtual size_t size() const { return 0; }
 
     virtual mode_t required_mode() const { return 0444; }
     virtual UserID owner_user() const { return 0; }