Remove invalid item from depends field of library.properties

[per1234]

The depends field of the library.properties metadata file specifies the dependencies that should be installed along with the library by the Arduino Library Manager.

This field must contain only the names of libraries that are available for installation via Library Manager.

The presence of any items which are not in Library Manager causes installation of the library to fail:

• Arduino IDE 1.x: "no protocol:" error
• Arduino IDE 2.x: fails silently (arduino/arduino-ide#621)
• Arduino CLI: "No valid dependencies solution found" error

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My guess is that this was intended to be Bolder Flight Systems Unit Conversions. However, I was not able to verify this because I found the "Bolder Flight Systems UBLOX" library and its example sketch don't have any dependencies on other Arduino libraries. For this reason, I opted to remove the invalid item from the depends field entirely instead of correcting the name.

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Originally reported at https://forum.arduino.cc/t/external-library-wont-install-using-library-manager/1127278

[per1234]

Not sure why the Units library is failing the dependency check

The name you used in the depends field of library.properties was Bolder Flight Systems Units

depends=Bolder Flight Systems Units, Bolder Flight Systems Eigen

but the actual name of that library is Bolder Flight Systems Unit Conversions (note the "Units" vs "Unit Conversions" difference):

https://github.com/bolderflight/units/blob/v4.2.1/library.properties#L1

name=Bolder Flight Systems Unit Conversions

The error would not occur if the depends field used the correct library name:

depends=Bolder Flight Systems Unit Conversions, Bolder Flight Systems Eigen