do not load the signal package, this is now done elsewhere

sphear_bf_power.m

@@ -31,7 +31,6 @@
 %%  along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 function [B] = sphear_bf_power(fmin, fmax, N, Fs, plotz)
-  pkg load signal;
 
   %% indexes in array for frequency bins
   imin = round((N/2) * fmin / (Fs/2));