Eliminate type parameters from abstract types

Author: akirakyle

src/abstract_types.jl

@@ -23,9 +23,9 @@ The state vector class stores an abstract state with respect
 to a certain basis. All subtypes must implement the `basis`
 method which should this basis as a subtype of `Basis`.
 """
-abstract type StateVector{B,T} end
-abstract type AbstractKet{B,T} <: StateVector{B,T} end
-abstract type AbstractBra{B,T} <: StateVector{B,T} end
+abstract type StateVector end
+abstract type AbstractKet <: StateVector end
+abstract type AbstractBra <: StateVector end
 
 """
 Abstract type for all operators and super operators.
@@ -41,7 +41,7 @@ For fast time evolution also at least the function
 implemented. Many other generic multiplication functions can be defined in
 terms of this function and are provided automatically.
 """
-abstract type AbstractOperator{BL,BR} end
+abstract type AbstractOperator end
 
 """
 Base class for all super operator classes.
@@ -57,6 +57,6 @@ A_{bl_1,bl_2} = S_{(bl_1,bl_2) ↔ (br_1,br_2)} B_{br_1,br_2}
 A_{br_1,br_2} = B_{bl_1,bl_2} S_{(bl_1,bl_2) ↔ (br_1,br_2)}
 ```
 """
-abstract type AbstractSuperOperator{B1,B2} end
+abstract type AbstractSuperOperator end
 
 const AbstractQObjType = Union{<:StateVector,<:AbstractOperator}