Remove archive detection

Summary: This isn't needed anymore.

Reviewed By: zeyadsalloum

Differential Revision: D15118792

fbshipit-source-id: 1074a8eab40dc9ebf9a64eeb86d43e435cce422b

FBControlCore/Utility/FBArchiveOperations.h

@@ -14,15 +14,6 @@ NS_ASSUME_NONNULL_BEGIN
 
 @class FBProcessInput;
 
-/**
- Enumerations for possible header magic numbers in files & data.
- */
-typedef enum {
- FBFileHeaderMagicUnknown = 0,
- FBFileHeaderMagicGZIP = 1,
- FBFileHeaderMagicIPA = 2,
-} FBFileHeaderMagic;
-
 /**
  Operations of Zip/Tar Archives
  */
@@ -103,22 +94,6 @@ typedef enum {
  */
 + (FBFuture<NSData *> *)createGzippedTarDataForPath:(NSString *)path queue:(dispatch_queue_t)queue logger:(id<FBControlCoreLogger>)logger;
 
-/**
- Get the header magic from some data.
-
- @param data the data to check.
- @return the header magic if one could be deduced.
- */
-+ (FBFileHeaderMagic)headerMagicForData:(NSData *)data;
-
-/**
- Get the header magic from a file
-
- @param path the file to checked
- @return the header magic if one could be deduced.
- */
-+ (FBFileHeaderMagic)headerMagicForFile:(NSString *)path;
-
 @end
 
 NS_ASSUME_NONNULL_END

FBControlCore/Utility/FBArchiveOperations.m

@@ -91,47 +91,8 @@ @implementation FBArchiveOperations
  }];
 }
 
-
-// The Magic Header for Zip Files is two chars 'PK'. As a short this is as below.
-static unsigned short const ZipFileMagicHeader = 0x4b50;
-// The Magic Header for Tar Files
-static unsigned short const TarFileMagicHeader = 0x8b1f;
-
-+ (FBFileHeaderMagic)headerMagicForData:(NSData *)data
-{
- unsigned short magic = 0;
- [data getBytes:&magic length:sizeof(short)];
- return [self magicForShort:magic];
-}
-
-+ (FBFileHeaderMagic)headerMagicForFile:(NSString *)path
-{
- // IPAs are Zip files. Zip Files always have a magic header in their first 4 bytes.
- FILE *file = fopen(path.UTF8String, "r");
- if (!file) {
- return FBFileHeaderMagicUnknown;
- }
- unsigned short magic = 0;
- if (!fread(&magic, sizeof(short), 1, file)) {
- fclose(file);
- return FBFileHeaderMagicUnknown;
- }
- fclose(file);
- return [self magicForShort:magic];
-}
-
 #pragma mark Private
 
-+ (FBFileHeaderMagic)magicForShort:(unsigned short)magic
-{
- if (magic == ZipFileMagicHeader) {
- return FBFileHeaderMagicIPA;
- } else if (magic == TarFileMagicHeader) {
- return FBFileHeaderMagicGZIP;
- }
- return FBFileHeaderMagicUnknown;
-}
-
 + (FBTaskBuilder<NSNull *, NSData *, id<FBControlCoreLogger>> *)createGzippedTarTaskBuilderForPath:(NSString *)path queue:(dispatch_queue_t)queue logger:(id<FBControlCoreLogger>)logger error:(NSError **)error
 {
  BOOL isDirectory;