Remove deprecated BIPMapping pass

[mtreinish]

Summary

This commit removes the deprecated BIPMapping pass. It was deprecated in qiskit-terra 0.24.0 and the minimum deprecation period has elapsed for the Qiskit 0.45.0 release. This pass has been moved to an external plugin that can be installed separately and integrated into the transpiler more cleanly than a single pass and also separates the optional dependency on the proprietary CPLEX into a separate package.

Details and comments

[qiskit-bot]

One or more of the the following people are requested to review this:

• @ElePT
• @Qiskit/terra-core
• @woodsp-ibm

[coveralls]

Pull Request Test Coverage Report for Build 6160673765

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 12 unchanged lines in 4 files lost coverage.
• Overall coverage decreased (-0.03%) to 87.239%

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Files with Coverage Reduction	New Missed Lines	%
crates/qasm2/src/expr.rs	1	93.76%
qiskit/quantum_info/synthesis/two_qubit_decompose.py	2	96.65%
crates/qasm2/src/lex.rs	3	90.91%
crates/qasm2/src/parse.rs	6	96.67%

Totals
Change from base Build 6160358090:	-0.03%
Covered Lines:	74147
Relevant Lines:	84993

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💛 - Coveralls

[jakelishman]

Can you update the docs and install hints around HAS_CPLEX and HAS_DOCPLEX to comment that they're no longer used by Qiskit, and update their install hints to remove the reference to the (already) non-existent extra bip-mapper?

[mtreinish]

I updated the docs in: 83a0d28

[jakelishman]

There's also the install='pip install qiskit-terra[bip-mapper]' lines in the actual definitions of those two objects (lines 249 and 255 of qiskit/utils/optionals.py) if you want to get those in this PR. It's pre-existing though (the optional was removed already), so we can get it in a follow-up if you prefer.

[mtreinish]

I updated them in: 2a72879 it makes sense to do it here even if it was pre-existing. I felt a bit odd about the cplex one though, because pip install cplex is installing a "free" demo version that is very limited. The real way to install cplex is to buy it from IBM and install the full package which includes the python extension without limitations.

[jakelishman]

Yeah, the CPLEX situation was always a bit of a problem, which is in part why we've walked the path that's led us to this PR overall haha.

The actual install command in the checkers isn't really going to matter because nobody will see it any more, but at least now it's not obviously incorrect.