Werk #7074: Reporting: Removed "first" column from graph legends

Component	Reporting & availability
Title	Reporting: Removed "first" column from graph legends
Date	Jan 18, 2019
Level	Trivial Change
Class	Bug Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	2.0.0i1 Checkmk Pro, Checkmk Ultimate MT 1.6.0p5 Checkmk Pro, Checkmk Ultimate MT 1.5.0p12 Checkmk Pro, Checkmk Ultimate MT

For consistency with the GUI graphs the "first value" column has been removed from the PDF graphs legend.

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