Remove Unicode (#2656)

Author: odow

Project.toml

@@ -18,7 +18,6 @@ Printf = "de0858da-6303-5e67-8744-51eddeeeb8d7"
 SparseArrays = "2f01184e-e22b-5df5-ae63-d93ebab69eaf"
 SpecialFunctions = "276daf66-3868-5448-9aa4-cd146d93841b"
 Test = "8dfed614-e22c-5e08-85e1-65c5234f0b40"
-Unicode = "4ec0a83e-493e-50e2-b9ac-8f72acf5a8f5"
 
 [compat]
 BenchmarkTools = "1"
@@ -37,7 +36,6 @@ Printf = "<0.0.1, 1.6"
 SparseArrays = "<0.0.1, 1.6"
 SpecialFunctions = "0.8, 1, 2"
 Test = "<0.0.1, 1.6"
-Unicode = "<0.0.1, 1.6"
 julia = "1.6"
 
 [extras]

src/Utilities/Utilities.jl

@@ -11,7 +11,6 @@ import MathOptInterface as MOI
 import MutableArithmetics as MA
 import OrderedCollections: OrderedDict
 import SparseArrays
-import Unicode
 
 function print_with_acronym(io::IO, s::AbstractString)
     return print(io, replace_acronym(s))

src/Utilities/struct_of_constraints.jl

@@ -214,7 +214,7 @@ end
 _typed(s::SymbolFS) = s.typed ? Expr(:curly, esc(s.s), esc(:T)) : esc(s.s)
 
 function _field(s::SymbolFS)
-    return Symbol(replace(Unicode.lowercase(string(s.s)), "." => "_"))
+    return Symbol(replace(lowercase(string(s.s)), "." => "_"))
 end
 
 # Represents a union of function or set types