refactor: remove initialNavOpenResponsive for redundancy

[MartinCupela]

🎯 Goal

Closes REACT-886

No need to keep initialNavOpenResponsive when we have initialNavOpen prop.

[github-actions]

Size Change: -28 B (-0.01%)

Total Size: 431 kB

Filename	Size	Change
./dist/cjs/index.js	229 kB	-28 B (-0.01%)

ℹ️ View Unchanged

Filename	Size
./dist/audioProcessing-BbOs2wMd.js	1.32 kB
./dist/cjs/emojis.js	2.96 kB
./dist/cjs/mp3-encoder.js	1.27 kB
./dist/css/index.css	45.3 kB
./dist/css/v2/emoji-mart.css	1.84 kB
./dist/css/v2/emoji-replacement.css	300 B
./dist/css/v2/index.css	39.4 kB
./dist/css/v2/index.layout.css	22.8 kB
./dist/WithAudioPlayback-DvH8PIGu.js	87.4 kB

_{compressed-size-action}