Apply suggestions from code review

Author: jhansson-ard

Diff for: content/hardware/01.mkr/01.boards/mkr-zero/product.md

@@ -9,7 +9,6 @@ forumCategorySlug: '/hardware/mkr-boards/mkrzero/140'
 productCode: '016'
 certifications: [CE, UKCA]
 sku: [ABX00007, ABX00012]
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 The Arduino MKR Zero is a development board for music makers! With an SD card holder and dedicated SPI interfaces (SPI1), you are able to play music files without extra hardware.

Diff for: content/hardware/02.hero/boards/leonardo/product.md

@@ -9,7 +9,6 @@ productCode: '008'
 forumCategorySlug: '/hardware/12'
 certifications: [CE, UKCA]
 sku: [A000052, A000057]
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 The Leonardo differs from all preceding boards in that the ATmega32u4 has built-in USB communication, eliminating the need for a secondary processor. This allows the Leonardo to appear to a connected computer as a mouse and keyboard, in addition to a virtual (CDC) serial / COM port.

Diff for: content/hardware/02.hero/boards/micro/product.md

@@ -9,7 +9,6 @@ productCode: '006'
 forumCategorySlug: '/hardware/12'
 certifications: [CE, UKCA]
 sku: [A000053, A000093]
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 The Micro runs on an ATmega32u4 processor with native USB communication. Configure via software whether the board is recognised as a standard Arduino, a mouse or keyboard.

Diff for: content/hardware/03.nano/carriers/nano-screw-terminal-adapter/product.md

@@ -7,7 +7,6 @@ primary_button_title: Get Started
 certifications: [CE, FCC, IC, RCM, REACH, RoHS, UKCA, WEEE]
 forumCategorySlug: '/hardware/12'
 sku: [ASX00037, ASX00037-3P]
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 The Nano Screw Terminal Adapter is a simple design that allows you to create robust designs with your Nano boards.