[cmake] remove BLA_VENDOR (has been fixed in cmake 3.16.2)
[cmake] remove BLA_VENDOR (has been fixed in cmake 3.16.2)

cmake 3.16.1 refused to find openblas, this has been fixed in cmake 3.16.2

toxa81/sirius,toxa81/sirius,electronic-structure/sirius,toxa81/sirius,electronic-structure/sirius,electronic-structure/sirius,electronic-structure/sirius,toxa81/sirius,electronic-structure/sirius,electronic-structure/sirius,electronic-structure/sirius,toxa81/sirius,toxa81/sirius