Remove obsolete ambiguity resolutions

Author: tkf

stdlib/LinearAlgebra/src/adjtrans.jl

@@ -251,10 +251,6 @@ function *(u::TransposeAbsVec, v::AbstractVector)
 end
 # vector * Adjoint/Transpose-vector
 *(u::AbstractVector, v::AdjOrTransAbsVec) = broadcast(*, u, v)
-# Adjoint/Transpose-vector * Adjoint/Transpose-vector
-# (necessary for disambiguation with fallback methods in linalg/matmul)
-*(u::AdjointAbsVec, v::AdjointAbsVec) = throw(MethodError(*, (u, v)))
-*(u::TransposeAbsVec, v::TransposeAbsVec) = throw(MethodError(*, (u, v)))
 
 # AdjOrTransAbsVec{<:Any,<:AdjOrTransAbsVec} is a lazy conj vectors
 # We need to expand the combinations to avoid ambiguities

stdlib/LinearAlgebra/src/qr.jl

@@ -725,7 +725,6 @@ function *(A::StridedMatrix, adjB::Adjoint{<:Any,<:AbstractQ})
         throw(DimensionMismatch("matrix A has dimensions $(size(A)) but matrix B has dimensions $(size(B))"))
     end
 end
-*(u::AdjointAbsVec, A::Adjoint{<:Any,<:AbstractQ}) = adjoint(A.parent * u.parent)
 
 
 ### AcQ/AcQc

stdlib/LinearAlgebra/src/triangular.jl

@@ -2020,11 +2020,6 @@ function *(A::AbstractMatrix, transB::Transpose{<:Any,<:AbstractTriangular})
     copyto!(AA, A)
     rmul!(AA, transpose(convert(AbstractArray{TAB}, B)))
 end
-# ambiguity resolution with definitions in linalg/rowvector.jl
-*(v::AdjointAbsVec, A::AbstractTriangular) = adjoint(adjoint(A) * v.parent)
-*(v::TransposeAbsVec, A::AbstractTriangular) = transpose(transpose(A) * v.parent)
-*(v::AdjointAbsVec, A::Adjoint{<:Any,<:AbstractTriangular}) = adjoint(A.parent * v.parent)
-*(v::TransposeAbsVec, A::Transpose{<:Any,<:AbstractTriangular}) = transpose(A.parent * v.parent)
 
 
 # If these are not defined, they will fallback to the versions in matmul.jl