remove duplicate definitions

[mimmi20]

I added a check for duplicate definitions in the browsers, devices and useragent files. I removed the duplicates found by this check.

Fixes #1820.

[codecov]

Codecov Report

Merging #1839 into master will increase coverage by 0.15%.
The diff coverage is 88.78%.

@@             Coverage Diff              @@
##             master    #1839      +/-   ##
============================================
+ Coverage     49.89%   50.04%   +0.15%     
- Complexity      758      764       +6     
============================================
  Files          1647     1647              
  Lines         59607    59462     -145     
  Branches      26496    26422      -74     
============================================
+ Hits          29741    29760      +19     
+ Misses        29866    29702     -164

Flag	Coverage Δ	Complexity Δ
#full	44.45% <87.5%> (+0.1%)	0 <0> (ø)	⬇️
#lite	2.11% <0%> (ø)	0 <0> (ø)	⬇️
#standard	25.76% <25%> (+0.05%)	0 <0> (ø)	⬇️

Impacted Files	Coverage Δ	Complexity Δ
...rces/user-agents/browsers/omniweb/omniweb-5-6.json	0% <ø> (ø)	0 <0> (ø)	⬇️
...rces/user-agents/browsers/omniweb/omniweb-5-0.json	0% <ø> (ø)	0 <0> (ø)	⬇️
...ources/user-agents/crawlers/yandex/yandex-bot.json	75% <ø> (+15%)	0 <0> (ø)	⬇️
...rces/user-agents/browsers/firefox/firefox-3-0.json	48% <ø> (+0.63%)	0 <0> (ø)	⬇️
...rces/user-agents/browsers/omniweb/omniweb-5-9.json	0% <ø> (ø)	0 <0> (ø)	⬇️
...owsers/samsung/samsung-android-browser-6-2-on.json	68.3% <ø> (+0.73%)	0 <0> (ø)	⬇️
...r-agents/apps/facebook/facebook-messenger-app.json	93.77% <ø> (+0.22%)	0 <0> (ø)	⬇️
...ources/user-agents/browsers/iron/iron-generic.json	17.39% <ø> (+4.34%)	0 <0> (ø)	⬇️
...rces/user-agents/browsers/omniweb/omniweb-5-1.json	0% <ø> (ø)	0 <0> (ø)	⬇️
...rces/user-agents/browsers/omniweb/omniweb-5-5.json	0% <ø> (ø)	0 <0> (ø)	⬇️
... and 34 more

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 51ff908...fee0f9e. Read the comment docs.

[jaydiablo]

I looked over all of this and did confirm the duplicate removals all look appropriate (nice finds!).

I think the PHP changes, particularly to the Expander class, could use another pair of eyes though, @asgrim?

[mimmi20]

@asgrim Do you have time to review this PR?

[asgrim]

Only minor things I'd pick up, but for the sake of brevity LGTM