Remove unnecessary methods

These are generated by BitFlags since it's first public release, and
adding these methods then makes the methods all ambiguous.

(Best guess is that the methods have been a long hold-over since a time
when BitFlags hadn't been fully fleshed out yet.)

Author: jmert

Project.toml

@@ -9,7 +9,7 @@ MacroTools = "1914dd2f-81c6-5fcd-8719-6d5c9610ff09"
 Mmap = "a63ad114-7e13-5084-954f-fe012c677804"
 
 [compat]
-BitFlags = "0.1"
+BitFlags = "0.1.7"
 MacroTools = "0.5"
 julia = "1"
 

src/consts.jl

@@ -7,14 +7,12 @@ import .Sys # explicitly imported to allow docs generation to override
     PROT_WRITE = 0x02
     PROT_EXEC  = 0x04
 end
-Base.cconvert(::Type{T}, pf::MmapProtection) where {T <: Integer} = T(pf)
 
 @bitflag SyncFlags::Cuint begin
     MS_ASYNC      = 0x1
     MS_INVALIDATE = 0x2
     MS_SYNC       = 0x4
 end
-Base.cconvert(::Type{T}, sf::SyncFlags) where {T <: Integer} = T(sf)
 
 @staticexpand @bitflag MmapFlags::Cuint begin
     MAP_FILE      = 0x00
@@ -67,7 +65,6 @@ Base.cconvert(::Type{T}, sf::SyncFlags) where {T <: Integer} = T(sf)
         MAP_STACK    = 0x2000
     end
 end
-Base.cconvert(::Type{T}, mf::MmapFlags) where {T <: Integer} = T(mf)
 
 # Provide this weird mode?
 #@static if Sys.islinux()
@@ -116,7 +113,6 @@ Base.cconvert(::Type{T}, mf::MmapFlags) where {T <: Integer} = T(mf)
         MADV_FREE = 6
     end
 end
-Base.cconvert(::Type{T}, af::AdviseFlags) where {T <: Integer} = T(af)
 
 # documentation requires the types to be defined first, so do after the fact
 let _flag_docs